const path = require('path')
const HtmlPlugin = require('html-webpack-plugin')
const isDev = process.env.NODE_ENV === 'development';
const webpack = require('webpack')
const ExtractPlugin = require('extract-text-webpack-plugin')
const config = {
    target: 'web',
    entry: path.join(__dirname,'src/index.js'),
    output: {
        filename: 'bundle.js',
        path: path.join(__dirname,'dist')
    },
    module: {
        rules: [
            {
                test: /\.vue$/,
                loader: 'vue-loader'   
            },
            {
                test: /\.css$/,
                use: ['style-loader','css-loader']
            },
            {
                test: /\.jsx$/,
                use: ['babel-loader']
            },
            {
                test: /\.(gif|jpeg|jpg|png|svg)$/,
                use: [{
                    loader: 'url-loader',
                    options: {
                        limit: 2048,
                        name: '[name].[ext]'    
                    }
                }]
            }
        ]
    },
    plugins: [
        new HtmlPlugin(),
        new webpack.DefinePlugin({
            'process.env' : {
                NODE_ENV: isDev? '"development"' : '"production"'
            }
        })
    ]
}

if(isDev){
    cofnig.module.rules.push(
        {
            test: /\.styl$/,
            use: [
                'style-loader',
                'css-loader',
                {
                    loader: 'postcss-loader',
                    options: {
                        sourceMap: true
                    }
                },
                'stylus-loader'
            ]
        }
    ),
    config.devtool = '#cheap-module-eval-source-map'
    config.devServer={
        port: '8000',
        host: '0.0.0.0',
        overlay: {
            errors: true,
        },
        //open: true
        hot: true
    }
    config.plugins.push(
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    )
}else{
    config.entry={
        app: path.join(__dirname,'src/index.js'),
        vendor:['vue']
    }
    config.output.filename='[name].[chunkhash:8].js'
    config.module.rules.push(
        {
            test: /\.styl$/,
            use: ExtractPlugin.extract({
                fallback: 'style-loader',
                use: [
                    'css-loader',
                    {
                        loader: 'postcss-loader',
                        options: {
                            sourceMap: true
                        }
                    },
                    'stylus-loader'
                ]
            })
        }
    )
    config.plugins.push(
        new ExtractPlugin('styles.[contentHash:8].css'),
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor'
    }),
    new webpack.optimize.CommonsChunkPlugin({
      name: 'runtime'
    })
)
    
}

module.exports = config